The Safe is the seventh episode of Season 4. It aired on November 7, 2012.
Sue and Brick buy a safe at a pawn shop hoping to strike it rich, but they have trouble getting it open. Axl continues to hobble around with his broken foot, but gets a smart girl named Cassidy to tutor him for US History class. Frankie starts classes to learn dental assisting. Unfortunately, she finds that the rest of the people in the class are more prepared than she is.